A new or recent non-M 3 or 4 Series will get better gas mileage than that, at least with a light foot.
I have gotten as high as 36 MPG droning on the highway in eco-pro mode in my X3M40i. Even around town it gets in the 20s.
Of course, a hybrid will be better, and an EV better still.
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A BMW car and several BMW motorcycles
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